IF YOUR COINS ARE IN YOUR WALLET, READ BELOW.
1. Send a screenshot of your wallet including date and time.
2. Include a copy/paste of your old wallet address and copy/paste of new wallet address. ( Obviously as soon as you have the new wallet.)
Don't you think some investors may not have bitcointalk account and may not want to have any?
Don't you think some investors may not want to disclose their
anonymous cryptocurrency holdings and link it with their accounts?
Don't you think anyone can easily make fake screenshots claiming he is the owner of any address?
I suggest you should:
1. Make new C2 addresses compatible with old ones
2. Take a snapshot of blockchain and calculate final balance for each address.
3. Transfer old C2 to new C2 automatically excluding attacker's address.
4. Post a how-to for importing "old" private keys into new wallet.
You have already failed twice. Please, take appropriate consultations with somebody who is heavily into crypto this time before making final decisions.